Sold a 20" upper last week, and have a hole that needs filled. Looking online, Hornady shows a 123 gr for both, but the 6.5G has a few hundred more ft/lbs at muzzle, and carries them much better. It seems to better choice, especially with the price coming down in other loadings. But, is there any reason that a larger (7.62 as compared to 6.5)bullet, would do better? Use a 154 gr in the x39 and maybe change things? Most shooting for now has been 100 yards or less. I have 2K rounds left for the SKSs we have. From the 123 fmj to 154gr Wolf softpoint. Wolf also does 120 MPT and 123 Softpoint, with many people having good luck with the 120gr MPT. I don't know how much I would shoot either one, but I know that shooting of a gun is inversely proportional the cost of its ammo. I am not travelling for several hours for a once in a lifetime, just going two counties over for a weekend. Thoughts?